I am a 27 YO male. Perfect vision history. Normally I have better than 20/20 vision and I have never needed glasses.
It started maybe a week ago? My vision started to get distorted and I noticed it was because of my left eye, my right eye is fine. When I close my right eye I can't even see the writing on the screen. Things like road signs are nearly impossible to decipher. Again, my right eye is fine I can see like I normally can.
I get a lot of blurriness out of my eye, no real graininess as you say. And yet I get periodic stabbing eye pain... mostly out of my left eye but I get it in both eyes. I also get flashes, sometimes see "stars", and I see strange "hues" especially on lighly colored objects like white walls. I have also noticed I have a tremendous amount of floaters in my vision, but I assume that is probably normal.
Any idea of what this could be? Is it ON or am I just crazy?
You are not crazy!
We can have sudden changes in vision for many reasons, and the way you describe your symptoms I would not think optic neuritis first, but it can be a possibility. Often times I have patients that have perfect vision in both eyes begin to notice that one eye is no longer perfect. It can be that they simply never realized they had blur in one eye because they never covered the other eye. In your case, because you have been noticing an increase in floaters in your left eye I would definitely recommend having your vision checked by a doc as soon as you can.
Pain behind both eyes is known as asthenopia and we often don't know why it happens. As long as the health checks okay it is usually nothing to worry about, but to know for sure you need to have a complete examination.